Humidity Controlled TMA

    Measurement of mechanical property change with respect to temperature and humidity

    TMA/HUM is an instrument where TMA measurements can be carried out in a water vapor atmosphere with a constant relative humidity. In TMA/HUM, TMA is measured at a constant water vapor partial pressure providing a complete understanding of the sample’s expansion or shrinkage with regards to different water vapor partial pressure. 

    TMA/HUM Overview

    Especially during sintering of ceramics in a water vapor atmosphere, the actual sintering conditions can be carried out in a laboratory-based environment. 

    Here TMA measurements held at a constant temperature while changing the relative humidity measure the swelling ratio with regards to relative humidity effective for the sample’s swelling property evaluation. 

    The humidity generator (HUM-1) uses N₂ base gas to create a water vapor containing a humidity controlled gas to be introduced to the TMA.

    Here, the TMA is equipped with a specialized electric furnace that keeps the temperature constant thru a circulator to prevent condensation even at high water vapor concentration atmosphere and can perform measurements at a maximum of 85℃ 90% RH atmosphere. The humidity sensor equipped with a feedback control leads to a stable humidity for longer measurements.  Since the relative humidity settings in TMA is integrated in the temperature program, the user can change the relative humidity in each step of the temperature program.

    TMA/HUM Features

    Humidity control
    High-sensitivity, high-precision measurement by the differential method
    Multi-measurement system that excels in expandability
    Flexible handling of various sample sizes
    Notable enhancement of heating and cooling rates enabled by a compact electric furnace
    Simple sample setting mechanism, the first of its kind in differential TMA
    Different measurement methods
    • Compression loading method
    • Tensile loading method
    • Penetration method
    • Differential penetration method
    • 3-point bending method
    • Single rod compression loading method
    Measuring temp. range
    • Standard model: Ambient to 1100°C
    • High-temperature model: Ambient to 1500°C
    Safety foremost emphasized on the entire system

    TMA/HUM Specifications

    Technique Humidity controlled thermomechanical analyzer
    Benefit Measurement of a mechanical property change with respect to temperature and humidity
    Technology Differential expansion principle where the thermal expansion or shrinkage generated from the detection mechanism itself can be canceled
    Attributes Multi-measurement system that excels in expandability
    Options High-temperature model: Ambient to 1500°C
    Computer External PC
    Dimensions 380 (W) x 580 (H) x 580 (D) (mm)
    Mass 30 kg (core unit)
    Power requirements 1Ø, AC100-120V/200-240V 50/60Hz 15A

    TMA/HUM Application Notes

    The following application notes are relevant to this product

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